@hackage gen-passwd1.1.0.0

Create wordlist-based passwords easily

A simple password generator

gen-passwd - a password generator

Usage: gen-passwd [--short] [--special] [--count INT] [--delimiter ARG]
                  [--acrostic ARG]
  Print a wordlist-based password

Available options:
  --short                  Use the EFF list of short words
  --special                Use the EFF list of special words
  --count INT              The number of passwords (default: 1)
  --delimiter ARG          The delimiter to use (default: " ")
  --acrostic ARG           The first letters of the words form this
                           word. (default: "")
  -h,--help                Show this help text

XKCD 936

You can find a longer explanation of this technique in this EFF article, along with the word list used by this program.